Holiday ornament



FIG. 1 is a side perspective view of a Christmas tree showing my new design;

FIG. 2 is a side elevational view thereof, all sides being identical;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a sectional view thereof, taken in the direction of the arrows upon the line 4—4 of FIG. 3; and,

FIG. 5 is a top plan view thereof. 

The ornamental design for a holiday ornament, as shown and described. 